"Craig A. James" <cjames@xxxxxxxxxxxxxxxx> writes: > Steve Atkins wrote: >> As long as you're ordering by some row in the table then you can do that in >> straight SQL. >> >> select a, b, ts from foo where (stuff) and foo > X order by foo limit 10 >> >> Then, record the last value of foo you read, and plug it in as X the next >> time around. > We've been over this before in this forum: It doesn't work as advertised. Look for postings by me regarding the fact that there is no way to tell the optimizer the cost of executing a function. There's one, for example, on Oct 18, 2006. You mean http://archives.postgresql.org/pgsql-performance/2006-10/msg00283.php ? I don't see anything there that bears on Steve's suggestion. (The complaint is obsolete as of CVS HEAD anyway.) regards, tom lane
